IQ.Pilot Release Commit @ bec7652

iqpilot/system/loggerd/xattr_cache.py

@@ -0,0 +1,28 @@
+import errno
+import os
+
+import xattr
+
+_cached_attributes: dict[tuple[str, str], tuple[tuple[int, int, int], bytes | None]] = {}
+
+def getxattr(path: str, attr_name: str) -> bytes | None:
+  key = (path, attr_name)
+  st = os.stat(path)
+  identity = (st.st_dev, st.st_ino, st.st_ctime_ns)
+  cached = _cached_attributes.get(key)
+  if cached is None or cached[0] != identity:
+    try:
+      response = xattr.getxattr(path, attr_name)
+    except OSError as e:
+      # ENODATA (Linux) or ENOATTR (macOS) means attribute hasn't been set
+      if e.errno == errno.ENODATA or (hasattr(errno, 'ENOATTR') and e.errno == errno.ENOATTR):
+        response = None
+      else:
+        raise
+    _cached_attributes[key] = (identity, response)
+  return _cached_attributes[key][1]
+
+def setxattr(path: str, attr_name: str, attr_value: bytes) -> None:
+  xattr.setxattr(path, attr_name, attr_value)
+  st = os.stat(path)
+  _cached_attributes[(path, attr_name)] = ((st.st_dev, st.st_ino, st.st_ctime_ns), attr_value)